I've been to two asanas classes in my life. The first one was a disaster. Poweryoga at the local gym. The instructor held a nice intro about all the chakras and the way of the kundalini, but I understood later that he thought it was all a nice fairy tale.
After 1 hour asanas, the rush in the spine was so strong, my back was bent backwards in a constant bow, so I couldn't walk straight. I had to wait for 20 min and just ground afterwards, lying in the hall. The teacher came up to me, frowned and when I explained this is what kundalini does, he was all startled. I suffered from uncomfortable overload a while afterwards.
The second time was with an Indian teacher. I sort of downloaded the Matrix program "asanas" and the body stood in all advanced positions with perfect balance. The teacher even said "I can't do this properly, but look at her, that's how to do it!!" and he was very impressed when I said I'd never made any of those asanas before.
I suffered from extreme overload during and after class.
The only time I could do asanas and enjoy them was on the three week Fiji retreat with Bernie Prior. But of course, then he held the space and balance for me all the time.
I dared to try again on the AYP England retreat, asanas with Christi, but soon realized I had to take a walk instead.